( resource ftp_stream, resource handle, string remote_file, int mode [, int resumepos])
ftp_nb_fget() retrieves remote_file
from the FTP server, and writes it to the given file pointer,
handle. The transfer mode
specified must be either FTP_ASCII or
FTP_BINARY. The difference between this function and the
ftp_fget() is that this function retrieves the file
asynchronously, so your program can perform other operations while the
file is being downloaded.
Returns TRUE on success or FALSE on failure.
See also ftp_nb_get(),
ftp_nb_continue(), ftp_fget(), and